Science & Mathematics - 10 October 2007

2007-10-10 12:04:53 · 8 answers · asked by Jellybean 1 in Mathematics

i love rain

2007-10-10 12:03:06 · 6 answers · asked by Rocky 1 in Weather

2007-10-10 12:02:45 · 7 answers · asked by Rocky 1 in Zoology

2007-10-10 12:01:40 · 3 answers · asked by Pyke L 1 in Mathematics

How do you determine the chemical equation of a acid?
For example nitric acid is HNO3 H2CO2 is carbonous acid.

How do you know what subscript to put? I know for a acid you always put the H and i know what the next two letters are if its nitric, carbonous ect. but what about the subscript?

Also was does the -ous and ic mean? You could have a carbonic and carbonous acid? How are they different?

Can some explain to me how this works in simple terms thanks.

Can you please use an example with sulphuric acid?

PLZ help

2007-10-10 11:58:29 · 2 answers · asked by Anonymous in Chemistry

I got 3(24x^2+36x-13) but can you make it 3(__x+__)(__x-__) fill in the blanks please..

2007-10-10 11:58:01 · 5 answers · asked by Allen C 3 in Mathematics

Please help me on my chemistry homework.

2007-10-10 11:56:45 · 5 answers · asked by Anonymous in Botany

what would happen to earth and or its organisms if there was no greenhouse effect?

2007-10-10 11:55:42 · 6 answers · asked by kissd07 1 in Astronomy & Space

A spherical iron ball 8 in. in diameter is coated with a layer of ice of uniform thickness. If the ice melts at a rate of 10 inches cubed / minute, how fast is the thickness of the ice decreasing when it is 2 in. thick? How fast is the outer surface area of ice decreasing?

2007-10-10 11:55:31 · 1 answers · asked by wongtongsoup22 2 in Mathematics

The Mariner 2 spacecraft did not enter Venus’s atmosphere, but it was nonetheless able to determine that the atmosphere is very dry. How was this done?

2007-10-10 11:55:15 · 4 answers · asked by Anonymous in Astronomy & Space

If humans at one time could tracel at the speed of light and made their way across the galaxy, then the world wich they have left would be completely diffrent then the world at which they returned. If this is the case it answers many of the unaswered questions from the items that we have found from the past. Such as the Crystal Skulls from the Myans and the Pramids found across the world. If the world at one time was advanced and was hit by a crater or such, it would change the axis. The world at which we are walking now was at once the artic and the artic at one time was the Rainforests of yesterday. When Humans are displaced they make what is comfortable to them and what they know. This is why we find Pyramids across the world. If you lost everything you would still build a house and a bed however you would have lost the ability to create the elaborate creations of which you once had. Just Think about it.

2007-10-10 11:54:05 · 14 answers · asked by truckeroif2 1 in Astronomy & Space

A mixture of Ne and Ar gases at 353 K contains twice as many moles of Ne as of Ar and has a total mass of 47.0 g. If the density of the mixture is 4.11 g/L, what is the partial pressure (in atm) of Ne?

2007-10-10 11:51:16 · 3 answers · asked by Joe C. 1 in Chemistry

Data from 1990 to 2006 was collected and showed the following linear equation:
Y=20+.05(X)
Y=predicted insurance prem.
X=Mileage driven per year

Interpret the meaning of the regression coefficient of x:
HELP???? please

2007-10-10 11:49:14 · 1 answers · asked by Anonymous in Mathematics

I have a friend who was told long ago that there was a constellation somewhere near Orion that bore her name. Can anyone confirm this, and give me some information on it?

2007-10-10 11:48:12 · 5 answers · asked by Jacob T 2 in Astronomy & Space

plz give me a straight answer and example!!! and dont 4get to tell me ur sorce of where u got ur answer!!!

2007-10-10 11:47:01 · 12 answers · asked by angel 1 in Mathematics

If an average human being wasto jump off a high building what is he average height the could jump from without breaking a bone or injuring themselfs.

2007-10-10 11:46:45 · 3 answers · asked by Anonymous in Biology

What are some chemical changes that occur in nature that some people believe are harmful to the environment?

2007-10-10 11:46:03 · 2 answers · asked by -peanut- 3 in Chemistry

is neg. i equal to the square root of 1?

2007-10-10 11:45:48 · 3 answers · asked by robert r 2 in Mathematics

Okay, to make it easy, the numbers in the problem are 1, 3, 12, 693.645, 12, and 734. How many sig figs do I round the answer? I know it's usually with the least significant value, right? But would that be the 1 and only round to one sig fig? It's probably a really dumb question, but oh well.

2007-10-10 11:45:40 · 1 answers · asked by Kori E 1 in Mathematics

A mixture contained zinc sulfide, ZnS, and lead sulfide, PbS. A sample of the mixture weighing 6.17 g was reacted with an excess of hydrochloric acid. The reactions are


ZnS(s) + 2HCl(aq) ==> ZnCl2(aq) + H2S(g)

PbS(s) + 2HCl(aq) ==> PbCl2(aq) + H2S(g)


If the sample reacted completely and produced 1.051 L of hydrogen sulfide, H2S, at 23oC and 745 mmHg, what were the percentages of ZnS and PbS in the mixture.

2007-10-10 11:44:04 · 1 answers · asked by Joe C. 1 in Chemistry

Planet X has an equatorial radius of 7.70E7 m and a mass of 6.10E26 kg.
(a)Compute the acceleration of gravity at the equator of Planet X.
(b) What it the ratio of a person's weight on Planet X to that on Earth?

2007-10-10 11:43:55 · 1 answers · asked by tommy t 1 in Physics

0.8(Y - 50 + 10) = 640
Y = ?

2007-10-10 11:43:03 · 5 answers · asked by Anonymous in Mathematics

If you can't do it in your head, try to find the answer on paper, if it doesn't look right then do it on a calculator. If it still doesn't look right the just put something random down. GOOD LUCK!!!

2007-10-10 11:42:15 · 10 answers · asked by Anonymous in Mathematics

if
A^2+C^2 = 25f
B^2 + C^2 =9f
(A+B-C)^2 + B^2 = 16f

2007-10-10 11:40:15 · 1 answers · asked by Anonymous in Mathematics

2007-10-10 11:39:07 · 8 answers · asked by boo 2 in Zoology

okay i got the first part
X+5=......
i just don't get when it says 5.5 times the middle integer

2007-10-10 11:39:00 · 2 answers · asked by jp_guitar_lover 2 in Mathematics

If a 20kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitud of 80N and is directed at an angle of 30 degrees above the horizontal.

2007-10-10 11:34:27 · 2 answers · asked by betty 1 in Physics

a mole of sodium has a mass of 23.0g
how many atoms are present in a 156g sample

so i said 156/23=6.78
6.78(6.02*10exp23)=4 081 560 atoms

2007-10-10 11:31:33 · 4 answers · asked by Josh j 1 in Chemistry

2007-10-10 11:28:53 · 2 answers · asked by te144 7 in Mathematics

9 - | 2 - 1 over 3y| = 0 and can you explain to me how you do it and give me a positive and a negative answer for it? step by step thank you

2007-10-10 11:24:42 · 1 answers · asked by Anonymous in Mathematics